In we learn that these shadowy "Omega Demons" are being sent out to kill time travellers across the timeline, including Waverider, Extant, Epoch and others. One, calling himself Legend survives. But ...

At the end of the “Crisis on Infinite Earths” Arrowverse crossover it was revealed that Barry Allen/The Flash (Grant Gustin) had put together something of a headquarters for Earth Prime’s heroes, ...

The Justice League consists of DC Comics strongest heroes and here are the villains they had to work together to beat.